Reducing-cap for nozzles.



No. 660,948. G. J. CARI-ISLE. Patented Oct. 30, I909.

nanucme CAP FOR NOZZLES. (Applicationfiled July 80, 1900.)

(No Model.)

UNITED STATES PATENT OFFICE.

GEORGE J. OARLISLE, OF ASHLEY, INDIANA, ASSIGNOR OF ONE-HALF TO JASPERN. ROBERTSON, OF SAME PLACE.

REDUCING-CAP FOR NOZZLES.

SPECIFICATION formingpart of Letters Patent N 0. 660,948, dated October30, 1900. Application filed July 30, 1900. Serial No. 25,285- (Nomodel.)

To all whom it may concern:

Be it known that I, GEORGE J. CARLISLE, a citizen of the United States,residingat Ash ley, in the county of Steuben and State of Indiana-,haveinvented new and useful Improvementsin Reducing-Caps for Nozzles, ofwhich the following is a specification.

My invention relates to nozzles; and the object of the same is toprovide a reducing-cap for the same which shall be simple inconstruction and efficient in operation.

The specific class of nozzles for which my invention is designed is onefor use on the exhaustpipe of a locomotive. By the use of my improvementthe amount and force of the exhaust into the smoke-stack are u nder thecontrol of the engineer at all times. This is particularly desirableWhen different kinds of coral are used. When using dirty or slowburningcoal, the nozzle would be set for a minimum exhaust corresponding to amaximum draft; but when clean free-burning coal is used it is set tocorrespond to a maximum exhaust or minimum draft.

In the drawings which accompany this specification and of which theyform a part,

Figure 1 is a longitudinal section through my nozzle with cap on it.Fig. 2 is a plan view and longitudinal section of the cap. Fig. 3 is aplan view and longitudinal section of the top portion of the nozzle.

Like numerals of reference designate like parts wherever they occur inthe different views.

My device is composed of two principal partsthe nozzle and thereducing-capand these will be taken up and described in the order named.

The numeral 1 designates the nozzle, which is fitted when in use to theexhaust-pipe of a locomotive; but of course it is not restricted tobeing used in this connection. The bottom portion of the nozzle isfrusto-conical in outer and inner contour. The inner wall 2 slopesgradually toward the axis up to a point to the mouth. Out in the top ofthe nozzle parallel to the axis and continuing down until they run outare grooves 5. The grooves correspond to grooves in the cap, as willappear hereinafter. The outer contour of the top of the nozzle 1 isvaried, and comprises shoulder 6, formed on it to support the cap, agroove 7 for a packing-ring 7 transverse grooves 8 to accommodate aset-screw seated in the cap, and a rounded portion 9, provided with anannular projection 10, adapted to fit the inner contour of the cap. Thetransverse grooves 8 are of a length just equal to the width of thelongitudinal grooves The reducing-cap is designated by the numeral 11.It comprises a lower or cylindrical portion 12 and an upper orconicalportion 13. The portion 12 fits over the packing-ring 7 on the nozzleand rests on the shoulder o. Seated in the portion 12 are a pair ofsetscrews 16, which-extend into the grooves 8,

.thus holding the cap on and limiting its motion. Formed in the portion13 are a series of grooves 17, which cut it longitudinally, are parallelto the axis, and continue down until they run out. These grooves 17 are'equal in cross-section to the grooves 5, with which they are adapted toregister. The portion 13 is also rounded out at '14 to correspond withthe portion 9 of the nozzle and is surmounted by a straight portion 15.

When my device is fitted to the exhaustpipe of a locomotive, it isconnected directly to the cab by suitable means for operating it, suchas a rod 18, fitted with a handle, and connected to a lever-arm whichextends into the cinder-box and connects with thereducing-cap at 19.When the maximum rapidity of exhaust is required, the rod 17 is pulled,the arm 19 actuated, and the reducing-cap turned so that the groovesregister. The groove 8 is positioned so as to limit the movement of thecap and compel it to stop at just the right point by limiting the travelof the set-screw 16. When the minimum exhaust is required, the rod 18 ispushed and the cap turned so that the ridges between the grooves 17 andthe grooves 5 are brought in line. The grooves 8 will limit the movementin the same manner as before, since they are equal in length to thewidth of the grooves 5 and 17. For degrees of exhaustintermediate themaxi- -mum and minimum the cap would be set at intermediate positions.

Having described my invention, what I claim as new, and wish to secureby Letters Patent, is-- 1. In a nozzle, the combination, substantiallyas described of a nozzle provided with interior grooves traversing itlongitudinally, the outer contourof said nozzle being rounded off on anarc and being broken by an annular projection, and a reducing-capmounted to turn on said nozzle and constructed to fit over the same andprovided with grooves constructed to register with the said interiorgrooves in said nozzle.

2. In a nozzle, the combination, substantially as described, of a nozzleprovided with interior grooves traversing it longitudinally, an exteriorgroove cutting said nozzle transversely and of a length equal to thewidth of one of said grooves, a reducing-cap mounted to limit themovement of said cap, and means .for turning said cap to register saidinterior grooves or to throw them'out of register.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

GEORGE J. GARLISLE.

Witnesses CHARLES H. BRUCE, P. MoGLoIN.

